Testing and Troubleshooting Modules

When a hierarchy is correctly defined, you can run the entire model and all modules connected to the model will run. A model can't run, however, if any of the following conditions exist:

Variables (or modules) within the model are invalid.
A module within the model has inputs in it that aren't assigned, either because they haven't yet been assigned or there aren't enough connectors going into the module to provide input values.
A module within it has connectors into it that aren't used.

If a module is correctly defined, with all module inputs assigned and variables defined, you can run the module on its own to test it. When you run a module in isolation, module inputs are held constant using the same rules as used for the Run Selected Sectors option. For more information, see Module Specs dialog box.